Grade 7 - Quarter 3 - Week 7 The center of a circle is
located at (3,-4) and the
end of a radius is located at
(-1,-4). What is the area of
the circle?
How do you solve? What formula do you use?

The area of the circle is around 50.24

Step-by-step explanation:

The formula for the area of a circle is

To find r, we can use the point that is given to us. To find the distance of the radius, we can use the formula

We can just plug in the points given into the formula and we get,

4.

Now we can plug 4 into the formula

Resulting in,

around 50.24.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.